Ansible jinja2 set variable

To do that, we'll use a new module: set_fact. local, the filter in the task above creates a name in a single line: If you use Twig, this will look familiar: we're reading a variable and piping it through some search filter, which comes from Jinja. Uncomment this line # to revert the behavior to pre-1. Using filters resembles using Unix pipes, where a variable is piped through a filter. Can you provide more details? Probably anything related to (primary_ip is a attribute which is set for majority of hosts in host_vars, thought not used in set. What is Ansible? Ansible is an all in one IT solution. Prior to ansible 2. How to create a dictionary variable from an array variable This trick involves using an empty dictionary and populate it with jinja2 combine filter. During a recent consulting project with a customer, focused on network automation Ansible allows you to reference variables in your playbooks using the Jinja2 templating system. 55 = us-east-1b } I will be using this variable in Jinja template but want to filter out the variable based on unique Avalability Zones and get the IP. May 27, 2015 · Ansible evaluates lookups for a variable every time that variable is used in the task at the time the task is run. Evaluating variable in Ansible 2. Ansible Roles help us to break or divided big playbook in to the small files. This {{ item. Ansible set_facts. Host: variables directly associated to a host, like inventory, include_vars, facts or registered task outputs Jul 09, 2014 · The other thing you have is the "play_hosts" variable in Ansible which should return all the hosts in the current play. If you want to get a lookup value once and use the same value for every task in a play, you need to register a fact with the set_fact module instead. set additional variables as key=value or YAML/JSON, if filename prepend with @-f <FORKS>, --forks <FORKS>¶ specify number of parallel processes to use (default=5)-h, --help¶ show this help message and exit-i, --inventory, --inventory-file¶ specify inventory host path or comma separated host list. Inside the jinja2 template, on the first line, place a header that overrides the default variable marker #jinja2: variable_start_string: "[%" , variable_end_string: "%]" Now any variable in the format [% variable %] will be interpreted, while any variables using the default ansible notation {{ variable }} will be left uninterpreted. It can operate on strings or lists of items, test various data to check if they are valid IP addresses and manipulate the input data to extract requested information. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. g. Ansible devs have disabled this feature because of ipaddr() is a Jinja2 filter designed to provide an interface to netaddr Python package from within Ansible. Ansible playbooks are also able to use variables, so we can combine both . address. Those variables can even be other lists Filters in Jinja2 are a way of transforming template expressions from one kind of data into another. But this set function cannot use as  A Subreddit dedicated to fostering communication in the Ansible Community, includes My problems is I can't figure out how to properly set VARIABLE1 and  18 Jan 2018 Filters are connected to variables via pipes, | , and the result is the modified variable. Ask Question Asked 1 year, 4 months ago. In this article, i’ll show the examples of how to test a variable in Ansible: if it exists or not, if it is empty or not and if it is set to True or False . One of the commands I need to run requires the Dec 09, 2016 · Setting the Ansible Vault Editor. 13. The Ansible admin can apply variables to specific hosts as well. 2. Note that, after each iteration, a new line is also added. If this is the case I would venture to say that your variable is not being pulled in from group_vars. If this is not the case are you are going with the above method then debugging is for sure what you would want to do in this stage of your troubleshooting journey. You are currently using just the one variable that you declared inside group vars. Oct 03, 2016 · The env plugin returns an empty string when the requested environment variable is not set. yml. How can I set the PATH or any other environment variable for a task or entire playbook? How do I handle different machines needing different user accounts or ports to log in with? How do I get ansible to reuse connections, enable Kerberized SSH, or have Ansible pay attention to my local SSH config file? For Mac create your own Ansible directory and then set the path in an Ansible configuration file: __ templates - using jinja2 We have set the variables for Merging groups and hostvars in Ansible variables. Recently, I needed to filter and map a list of host interfaces. is a pre- defined Ansible variable, that automatically is set to the host as  24 Mar 2016 Jinja has a built in default filter that can be used to set a default value when one isn't provided. 1) and also some development version features (2. Aug 30, 2014 · [ansible-project] jinja json template adds an extra comma breaking json structure [ansible-project] Intersection of group variables inside a Jinja template. The second course, Hands-On Infrastructure Automation with Ansible, covers practical course for beginners to Ansible and deployment of applications the right way. (Optional) Set ansible_host variable to IP address. May 02, 2019 · Templates are one of the best methods for creating configuration files as they allow dynamic variables. seed = { 10. Let’s get started on how to install Ansible on Linux Ubuntu and macOS. It is by default considered as a variable. If the value has "lab. A quick name: Set timezone variables tags: timezone copy: content={{ timezone|default("UTC\n")  . Then I have a jinja2 template that puts out a different file depending on the data center. Tag: jinja2,ansible,ansible-playbook Based on extra vars parameter I Need to write variable value in ansible playbook ansible-playbook playbook. Check if variable is defined (exists): {% if variable is defined %} variable is defined {% else %} variable is not defined {% endif %} Variables can be defined as simple string, integer, or float types, or they can be complex data structures. 37. com[es:children]es-masterses-slaves I also have a Jinja2 template file that needs a certain value set to "true" if a host belongs to the "es-masters" group. Use {% raw %}/{% endraw %} blocks as Jinja2 documentation suggests. However, if your yaml file looked like that:--- nodes: - ip: 1. x the variable precedence is as follows from When there are no processes owned by testuser, the registered variable comes back empty. Why wasn’t this working? The default() filter provided by Jinja2 treats the special class Undefined differently from False-y Python values. In the below task, I am looping over the list1 variable in the template, using the for loop structure. Tip Using tests as filters is deprecated since Ansible v2. Posted by. The following values are considered false: any empty mapping, for example, {}. Two Jinja2 templates were created for two configuration “modules” to show how a full configuration can be broken up into smaller pieces. ) The term filter might be confusing at times because all the filters work very differently. The variable datacenter from inventory is the string that determines dcvar1 or dcvar2. Consider the following inventory group: item as an array and (at least in python 2x), variable length args have to come after named args. Configuration Management 101: Writing Ansible Playbooks March 23, 2016 This tutorial will walk you through the process of creating an automated server provisioning using Ansible, a configuration management tool that provides a complete automation framework and orchestration capabilities. j2 extension, which denotes the Jinja2 templating engine used. When a variable of higher precedence wins, it will replace the other value. Python (Jinja2) variable inside a variable. The playbook uses the following variables to describe the configuration sections that have to be removed. Let’s say you want to remove from your dictionary (object) all elements with value of empty string. Please note that all templating happens on the Ansible controller before the task is sent and executed on the target machine. So to your question, yes, there are easier ways now that can make things In the above example, we set variables at both a group and an individual host level. Firstly, assuming number_nodes has the values of 1,2,3, you are trying to access the element of node but you do not have such a variable in the provided yaml. 68. August 13, 2019 - Ken Celenza Updating a list or dictionary within python is a trivial manner, however within Ansible and Jinja, it is not as easy or well defined. 1 : ok=2 changed=0 unreachable=1 failed=0 Any thoughts / assistance would be appreciated. So to your question, yes, there are easier ways now that can make things They take some arguments, process them, and return the result. First add the following line to your ansible. I've googled but I can't find a solution to what I'm trying to do. 0. 21. Conditionals are another instance of Jinja2 in action within Ansible plays themselves. A few of Vault's commands involve opening an editor to manipulate the contents of an encrypted file. There is a workaround for this using . The big issue with this is the application there are a lot of settings that don't always need to be set. Before you could override Jinja2 evironment settings by placing #jinja2: variable_end_string: [[, variable_start_string: ]] on the first line of a template file so that {{ }} weren't not treated as tags. 93 = us-east-1b 10. Add jinja2_native = True to the [defaults] section of ansible. When using undefined variables in actual Ansible playbooks without default filter AnsibleUndefinedVariable will be thrown. j2 template. Jinja2 is also used as a template language by configuration management tool Ansible and the static site generator Pelican, among many other similar tools. 0. It's basically a case/switch statement and this is the logic (with incorrect syntax): if {{ existing_ansible_var }} == "string1" new_ansible_var = "a" else if {{ existing_ansible_var May 21, 2016 · Embedding Jinja2 templates in YAML files is one of Ansible's distinguishing features. Variables cannot be set in loops and that is intentional. 3), Ansible will raise errors when attempting to dereference # Jinja2 variables that are not set in templates or action lines. In Ansible, we use Variables as a way to deal with things that differ between one system and the next. spawning a new VM without overprovisioning the cluster. In addition to those, Ansible supplies many more. #display_args_to_stdout = False # by default (as of 1. I am working on a playbook to join linux systems to Active Directory. The examples so far have used variables in the context of playbooks to control the flow of execution and capture the result of command executions. How can I set the PATH or any other environment variable for a task or entire playbook? How do I handle different machines needing different user accounts or ports to log in with? How do I get ansible to reuse connections, enable Kerberized SSH, or have Ansible pay attention to my local SSH config file? item as an array and (at least in python 2x), variable length args have to come after named args. Apr 16, 2018 · While the trailing line break would be removed, the spaces in the mount_options variable would remain. The Jinja templating engine that Ansible utilized under the hood can do much more though. 0, if “regex_replace” filter was used with variables inside YAML arguments (as opposed to simpler ‘key=value’ arguments), then you needed to escape backreferences (e. How to append to lists in Ansible. Finally, master troubleshooting, validating, and testing with Ansible. Why? In some ways it comes down to documentation, a mixing of languages (YAML, Python, Jinja2), and variables. But the author of an Ansible Role cannot predict how the end user would like to customize variables for their environment using group_vars, host_vars, play vars, inventory, etc. 18. As already referenced in the variables section, Ansible uses Jinja2 templating to enable dynamic expressions and access to variables. Ansible substitutes the value of the variable when pulling the host  Jinja is a web template engine for the Python programming language and is licensed under a Jinja is Flask's default template engine and it is also used by Ansible and Trac. mode|default(omit)}} with_items : - path : /tmp/foo - path : /tmp/bar - path : /tmp/baz mode : "0444" Mar 29, 2017 · Removing the whitespaces in ansible template {% for i in range(3) %} variable {{ i }} {%- endfor %} output ------ mdtutorials2 $ cat hello_world. For example, in the following code myvar is a variable; Ansible will pass myvar to the Jinja2 filter as an argument. 55 = us-east-1b May 18, 2017 · Whitespace Control with Jinja Templating in Ansible <= 2. - name Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchestration, and many other IT needs. This may include warnings about 3rd party packages or Ansible Variables. Ask Question Asked 1 year, 11 months ago. After a variable is defined using a task or the inventory, it can be accessed virtually anywhere in your playbooks by putting the variable name inside double Current host is test4 The ips for this host are: - 127. Facts versus Variables (Optional) Set ansible_host variable to IP address. Provide details and share your research! But avoid …. 0/24 and your ansible_zone is ansible. 3. However, these on-the-fly-created variables have several drawbacks, and you need to carefully think about it before creating one: A) With Ansible 2, you can set a ProxyCommand in the ansible_ssh_common_args inventory variable. NOTE: Conditional clauses are considered to be raw Jinja2 expression without double curly Ansible variable names must start with a letter and only contain letters, numbers or underscores. 1. read()) print tmpl. Any advise is appreciated. . There's nothing particularly complicated about using Variables inside a Playbook. See builtin filters in the official Jinja2 template documentation. /ansible $ source . For sequences, (strings, lists, tuples), use the fact that empty sequences are false. yml -e "param1=value1 param2=value2 param3=value3" python,jinja2,ansible. Jinja2 template variable if None Object set a default value (Oct 27 '13) For Jinja, Ansible Jinja Warrior - Mastering "Loop Variable Scope" (16 Feb 2017) Variables are key in Ansible and when you know how to flexibly use variables, a whole lot of possibilities become available. Ansible takes these two input parameters and outputs the per-node configuration file for each node within its inventory. ansible,ansible-playbook I'm trying to set a variable in an Ansible playbook based on an existing variable's value which could be one of many different strings. Variable in playbooks are very similar to using variables in any programming language. One can put conditions around the value of the variables and accordingly use them in the playbook. cfg file; Play set in plays vars and include_vars; Host set via host groups or on hosts by the inventory, facts or registered tasks Ansible Roles: Ansible Roles are independent and small function files that used in ansible playbooks. NOTE: You can view this project on GitHub. Using list variables in Ansible templates. Sep 17, 2019 · For example, a Playbook might declare a task to set up a server configuration file using a template and inject declared variable values in the file. 12 = us-east-1a 10. . For instance, in a simple template, you can do something like: My amp goes to {{ max_amp_value }} The rest of this page describes YAML configuration, Ansible playbook, and Jinja2 template I used to remove configuration section from Cisco IOS device configuration with regex matches (the full source of the playbook can be found on github). 168. They can be viewed using the following Ad-Hoc command: [crayon-5dd04b575f659385769079/] or this Task: [crayon-5dd04b575f66f861104227/] Note that the latter provides much more information than the former. A global variable applies to all managed hosts. render( variable = 'Value with <unsafe> data', item_list = [1, 2, 3, 4, 5, 6] ). Check if variable is defined (exists): {% if variable is defined %} variable is defined {% else %} variable is not defined {% endif %} Oct 31, 2019 · Jinja templates in Ansible can be very powerful. In the provided example "ansible_os_family" is a fact variable Ansible will set. According to Jinja2 documentation you can manage whitespace and tabular indentation with lstrip_blocks and trim_blocks options:. I don't want to have to write a huge template of if / thens for each variable. Let's take this list of users I have a variable with list of node IP's and its respective Availability Zone. yaml and passes it to Jinja along with a copy of container. Updating Structured Data in Ansible & Jinja. By default Ansible will override variables in specific precedence orders, as described in Variables. 9, use is %test_name% or is not %test_name% instead where %test_name% might be any test like success , failed , search , etc Ansible Variables. I can't seem to find a way to convert the value of ansible_hostname to uppercase. Ansible Tower notifications can be configured for job failure via email, Slack or other methods. txt Removing the whitespaces in ansible template variable 0 variable 1 variable 2. Secondly, you cannot iterate over three different variables in such a way. The set_fact module is yet another way. Here we define that the variable ‘webserver_package’ is httpd for each host. Mar 29, 2017 · Now, let us see how to use ansible variables like list or dictionary in the templates files. The if statement in Jinja is comparable with the Python if statement. Ansible - Defining Variables As Dictionaries 6 minute read This post is to go through an example of defining Ansible variables as dictionaries rather than lists. yml -e "param1=value1 param2=value2 param3=value3" Then I have a jinja2 template that puts out a different file depending on the data center. 6. The python application can solve any kind of variable instantiation challenge while leaving the . Ansible will find this file via ANSIBLE_CONFIG variable. Oct 24, 2017 · The group_vars folder and the variable files were explained to show different ways variables can be used with both Ansible and the Jinja2 templating engine. Set mount option for given mount point with ansible. This is even mentioned in Jinjas (excellent) Template Designer Documentation: Please keep in mind that it is not possible to set variables inside a block and have them show up outside of it. Ansible has a template module that uses Jinja2 in its core. json or --extra-vars @filepath. I want to set a jinja2 variable based on the hostname of a server (I'm using different certs and want to have ansible create the use a variable inside json_query in ansible/jinja. cfg: [defaults] jinja2_extensions = jinja2. python,jinja2,ansible. A quick modification to your /etc/ansible. An empty string is False-y in Python. abcd. So I'm trying to create the template like this: As of Ansible 1. com" keyword in it, it should directly store the value to "host_fqdn" again or else it should add "lab. ) Explanation: In old version any value returned is a string so even if you used an int filter inside, the output is always rendered in as ansible string. ipaddr() is a Jinja2 filter designed to provide an interface to netaddr Python package from within Ansible. Ansible  You can define a new variable the same way: name: set default set_fact: new_ansible_var= "" - name: set to 'a' set_fact: new_ansible_var=  16 Feb 2017 Jinja templates in Ansible can be very powerful. We already know that we can set variables in 3 different ways: with vars, vars_prompt or by using the register key below a task. It’s quite likely there was no default for ‘name’ supplied at all. 10 Aug 2019 As already referenced in the variables section, Ansible uses Jinja2 templating to enable dynamic expressions and access to variables. It helps you to use and assign a value to a variable and use that anywhere in the playbook. When you register a variable in ansible, you also tell ansible the name of the variable you want to register it as - in your case, eth0: register: eth0 So to access it later, you would have to use the name eth0 like so: IPADDR={{ eth0. Please keep in mind that it is not possible to set variables inside a block and have them  25 Aug 2014 We use this information to set up host aggregates. Nov 02, 2018 · The Ansible-packaged ipaddr jinja filter is versatile - it is capable of achieving a larger number of routine IP address manipulations. You could technically use ansible. Instead of including oft-changed values, such as usernames or IP addresses, directly in the playbook, the user refers to external variables. It works The template module is extremely useful for doing machine-specific configuration based on Ansible variables. port }} works fine, but key 'abcd' varies in each dictionary. Jinja2 is written in Python and allows Python-like expressions which allows us to have Python features and flexibility to be embedded into our configuration file management strategy. This documentation covers the current released version of Ansible (2. Using a CM-tool ensures that every deployment is done in exactly the same way. Viewed 3k times 1. We’ve condensed the script and created a fully idempotent role that can enforce the desired state of the sudoers file. It's easier to inspect it that way, Re: How to easily test/experiment with jinja templating in ansible? Jul 29, 2016 · According to Jinja2 documentation you can manage whitespace and tabular indentation with lstrip_blocks and trim_blocks options: trim_blocks: If this is set to True the first newline after a block is removed (block, not variable tag!). ansible_default_ipv4. my-network. I'm trying to have a basic working configuration that's dynamic for the defaults, though it wont always be used. While you can do a lot of complex things in Jinja, only the basics are things you really need to learn at first. 29 Mar 2017 Working with Ansible template module for configuration The template files will usually have the . Ansible Galaxy encourages code sharing via Roles. Also, mention that bool filter for empty and non-empty lists and dicts evaluates to False . As a simple example (without many options for the virtual hosts), here's all I had to do to make Ansible and Jinja do the heavy lifting for me: Thanks for contributing an answer to Unix & Linux Stack Exchange! Please be sure to answer the question. False: keep_trailing_newline: Preserve the trailing newline when rendering templates. # by default (as of 1. Asking for help, clarification, or responding to other answers. There are other forms of conditional clauses, but when is usually all that is needed. 147 = us-east-1a 10. comhost3. Some for example reduce a result set of a hash/array, some modify contents … Continue reading Jinja2 Filter Overview Jun 04, 2018 · The above Playbook uses Ansible Jinja2 templating to render variables within the below index. Ansible greatly expands the number of filters and tests available, as well as adding a new plugin type: lookups. value. Jun 04, 2018 · The above Playbook uses Ansible Jinja2 templating to render variables within the below index. I have had issues in the past using the DNS name and the task below overrides the variable with the IP address of the host: I have had issues in the past using the DNS name and the task below overrides the variable with the IP address of the host: Ansible is decentralized–it relies on your existing OS credentials to control access to remote machines. 7 of Ansible. 1. There are numerous Jinja 2 filters but Ansible brings some additional filters. Use at least version 2. Jan 05, 2015 · (3 replies) Hi, I just started playing around with ansible and tried to achieve a simple operations task with it: Iterate over all nodes of my Xen-Cluster -- get free_memory of every node and sum up those values. –inventory-file is deprecated-k, --ask-pass¶ item as an array and (at least in python 2x), variable length args have to come after named args. Mar 15, 2017 · set_fact creates variables in your Ansible script at runtime to have a more dynamic behavior. It represents the ansible-provisioning, where the automation is defined as tasks, and all jobs like installing packages, editing files, will be done by ansible modules. Check Variable in Jinja2. My intention of this project was to use IaC as the main driver. Because jinja2 will only process the template variables it is told to, it will leave other { {variables}} for ansible to define. limit is set to all so Vagrant knows it should run the Ansible playbook connected to all VMs, and not just the current VM. Functions, Filters and Control Structures in Templates. Note: We need not use the “{{ }}” in the when statement for the variable. From ansible 2. js , Python and others. Ansible Templates are very useful for configuring a system with lots of changes per configuration file. In Ansible, variables are similar to variables in any programming language—they let you input values and numbers dynamically into your playbook. But it doesn't seem to have a lookup for . with open('example. As of Ansible 1. I have a variable with list of node IP's and its respective Availability Zone. Aside from the typos, I had to account for the fact that variables set in a loop are scoped for the life of the loop, and are thus vars set/modified in the loop are unavailable outside the loop. Jinja2 ships with many of these. Dec 02, 2015 · when you try to evaluate if a variable exists within a jinja2 template. Variables simplify operations by allowing you define and declare them throughout all the various roles and tasks you want to perform. properties July 27, 2016 August 3, 2016 / Roger Castells It’s really important to know how Jinja2 works if you want to create powerful templates for your playbooks. They can also be a leading contributor to hair loss. 3 Oct 2016 The env plugin returns an empty string when the requested environment variable is not set. /hacking/env-setup. It offers a wide range of control structures, functions and filters. An Ansible2 Tutorial. This role runs in Ansible, Ansible Engine or Ansible Tower. In this scenario, Ansible should be able to compare the template configuration file to the actual file on the server and create or update it only if necessary. May 24, 2017 · By default ansible uses the replace strategy when combining variable definitions. Set flag in Jinja2 loop, access outside of loop [duplicate] python,jinja2 This question already has an answer here: Jinja2: Change the value of a variable inside a loop 2 answers I would like to set a flag inside a Jinja2 template for loop and later display something or not depending on the flag like so: {% set foobar = False Tips & tricks for Ansible. 20 Nov 2015 Our main goal today is to work with jinja2 templates and variables. Variables can be defined as simple string, integer, or float types, or they can be complex data structures. It's very useful. in Ansible is based on Jinja2, so you need to check Jinja2 filters  Ansible uses the Jinja2 templating language for this purpose. We will see, how surprisingly easy those tasks are performed using Ansible and how input variables (like host name, order ID) come into play. next step would be making a decision e. The (host=host_obj) command tells the baseline that the variable host within the template will be equal to host_obj, which is the variable that was set to the actual YAML data. If I specify “eth0” as the value for “primary_interface”, Ansible will treat that as ansible_eth0 and thus pull the IPv4 address for eth0 when rendering the template. Ansible offers a set of inbuilt filters. I’ll also give two examples of how to combine these checks. Ansible uses declarative YML “playbooks” to map a group of hosts (from “inventory”) to well defined roles. ext. Ansible - Variables. 2 - ip: 3. We use a very similar syntax to that which you've already seen: Aug 23, 2018 · Variables. conf to the Netscaler node which alters the saved configuration. I have had issues in the past using the DNS name and the task below overrides the variable with the IP address of the host: I have had issues in the past using the DNS name and the task below overrides the variable with the IP address of the host: Dec 31, 2017 · Ansible provides a rich set of filters, which you can apply to your variables. Ansible Playbook is a set of instructions that you send to run on a single or group of server hosts. In this context there are several useful tests that you can apply using Jinja2 filters in Ansible. path}} state=touch mode={{item. Need to process complex data? Like rearranging keys in a list of nested dicts. Ansible / jinja’s syntax can be mind boggling at times and this was a real help. The Jinja2 filter will then process it and return the resulting data. 23 Feb 2014 Ansible can also generate files based on Jinja2 templates and variables the variable 'item' will be set to equal one of with_items elements on  31 Dec 2017 Ansible provides a rich set of filters, which you can apply to your variables. Worked with ANSIBLE_JINJA2_NATIVE=1 too. I want to set a jinja2 variable based on the hostname of a server (I'm using different certs and want to have ansible create the Jul 29, 2017 · Ansible when variable equals another value. For example, if your IP range is 192. Jul 16, 2018 · Ansible substitutes the value of the variable when pulling the host variable to render the template. We use a very similar syntax to that which you've already seen: Ansible Online Course will enhance the knowledge about the usage of set up, inventory, playbooks of Ansible, provisioners, infrastructure with Ansible, deployment with ansible, testing, and continuous integration Docker container with Ansible. You could use jinja2 in a set_fact to create a custom dictionary using jinja2 namespace The latter is what I usually choose to do, as it is quite simple to set up, and the facts are always available on all hosts, even if you are doing something like: getting all the facts for all the hosts while connected to a nagios host in order to generate its configuration files. The below diagram outlines the process that Ansible executes in order to generate the per-node router configuration. An important note on scoping here. We then upload the resulting ns. After some research, I found out, that this is working as intended. It’s an IT orchestration engine which automates configuration management, application deployment, remote infrastructure management command based simple tool. You can also use conditions around the variables. Dec 09, 2016 · The mysql_password variable will be set to the value of the vault_mysql_password variable, which is defined in the vault file. You are accessing the register variable eth0 by trying to use the name "register" which doesn't exist. Variables are set on a host-by-host basis just like facts discovered by the setup module. At the end of the loop declaration, a dash is added before the end of the tag - -%} - this means jinja2 will collapse any whitespace it encounters in the loop. Declaratives are used to instruct Ansible how to set up or change things, and Ansible makes the required changes. I am trying to iterate over a dictionary in a Jinja2 template (in Ansible). Before the build command can be executed, Jinja is called to perform template rendering. Let us go through some ways in which it can be done. This caused issues with the cleaned up scoping behavior and has since been improved. Generally speaking, variables set in one role are available to others. One of the arrays or keys in the dictionary is 'abcd'. Platform as a Service (PaaS) is a cloud service… How to create a new config file in Ansible playbook 192. Using this is easier than setting configurations in code, due to the order this configuration file is loaded in and how Ansible reads in constants. We have created a variable test1 and checking if the value is “Hello World” using the when statement. do,jinja2. env files, as used in Laravel projects, also available for PHP , Ruby , Node. No problem! You can do it with set_fact, with_items and register. _Note: A better approach might be to use the ansible regex_replace filter within map, Jul 27, 2016 · Examples: /etc/hosts and workers. Jun 19, 2017 · Changing a deeply-nested dict variable in an Ansible playbook June 19, 2017 I recently had to build an Ansible playbook that takes in a massive inventory structure (read from a YAML file), modifies a specific key in that file, then dumps the file back to disk. Following is the simplest example of checking whether the value of a variable. Facts versus Any variables that aregenerated are added within inventory file and used as group variables within the roles. Variables with a play scope apply to a play and related structures. x > System Administration Tools > Ansible > Ansible tips and tricks > Working with lists and dictionary variables in ansible. Search keyword in "host_fqdn" variable. For example, the capitalize filter capitalizes any value passed to it; the to_yaml and to_json filters change the format of your variable values. (Also see Conditionals. Ansible can warn you when variables aren’t defined – it’s the default behavior in fact. Transforming variables with Jinja2 filters ¶ Jinja2 filters let you transform the value of a variable within a template expression. limit with a provisioner configuration for each of the individual VMs, and just run the VM-specific playbook through Vagrant, but our live production infrastructure will be using one playbook to configure all the servers, so we'll do the same locally. use a variable inside json_query in ansible/jinja. For example: my_dict: test1: {'var1': 'hello'} {% if my_dict['test2'] is defin Ansible seems to throw &amp;quot;AnsibleUndefinedVariable: One or more undefined variables:&amp;quot; when you try to evaluate if a variable exists within a jinja2 template. Create variable as dict using jinja2 within playbook. It obviously makes sense to be familiar with both, and you’ll have to understand the basics of YAML to write your playbooks. # error_on_undefined_vars = False # by default (as of 1. To ensure things run Jun 07, 2017 · Ansible Role Variables as Defaults. stdout }} Generating/Executing Terraform Plans Using Ansible 14 minute read Recently I have been working on a little project of my own based on provisioning a vSphere environment using Ansible as the primary automation tool. Ansible uses Jinja2 to implement variable dereferencing, so for more details on this topic, see the Jinja2 documentation on variables. Ansible 2 is out, and that means it's time to upgrade the previous article on Running Ansible Programmatically for Ansible 2, which has significant API changes under the hood. env files in Ansible Ansible has various ways of looking up data from outside sources, including plain text password files, CSV files and INI files. mode|default(omit)}} with_items : - path : /tmp/foo - path : /tmp/bar - path : /tmp/baz mode : "0444" Loop over Ansible variable array in Jinja2 template. Oct 22, 2014 · [ansible-project] accessing variable's in dict file stored in host_vars [ansible-project] registered variables and ec2 with_items on private and public subnet [ansible-project] Pass variable to hosts: in playbook [ansible-project] How to use conditions in Playbook itself [ansible-project] Referencing Ansible Variables Nov 20, 2015 · a shell script and a data file are created from Jinja2 templates, the files are uploaded, the shell script is performed on the remote target machine and; the log is retrieved from the target machine. j2 or test playbook)? needs_info How to append to lists in Ansible. or set a small template action to dump the contents of the dictionary/variable whatever to a local file on my box. 5 Sep 2018 How to check if Jinja2 variable is empty or not empty, exists or not exists, defined or not defined, if it is set to True or not. Jun 24, 2018 · Variable in Ansible. Per the standard Ansible variable precedence rules, Variables in Ansible are very similar to variables in any programming language. 2 or older, I need to create a bash script using the template module[ 1 ] that will modify a CentOS image. You will see a lot of tricks involves this technique of using with_items and jinja2 filter. They can also be helpful when trying to build out vastly different configurations automatically by using dynamic/changing variables. This doesn’t only make your job as a system engineer a whole lot easier, Jul 09, 2014 · The other thing you have is the "play_hosts" variable in Ansible which should return all the hosts in the current play. 21 Mar 2018 mode – If you want to set the permissions for the destination file explicitly, Defining default values for undefined variables: Jinja2 provides a  18 Apr 2017 If you want to use default with variables that evaluate to false you have to set the The default or d filter is used to specify a default value if a variable is See the Ansible section of my Knowledge Base for more information. yml reusable for other scenarios. For example the ipaddr  Using a variable set by the template, the for loop will iterate over the list of MOTD A port of Ansible json_query Jinja filter to make queries against JSON data  Ansible's template module transfers templated files to remote hosts. I wanted to throw this together as I have not found a decent example of doing this. It seems we need stronger weapons for this to work. The Ansible inventory sets a VENDOR_MODEL host variable for each machine:  17 Apr 2019 Jinja2 is a modern and designer-friendly templating language for In Ansible, more then 21 places we can declare or define variable or value  2 May 2019 Minto Joseph explains how Ansible Jinja2 templates allow for If only set_category variable is set to TRUE, the category will be updated. The idea is that if a developer already knows Jinja2 from working with one project then the exact same syntax and style can be used in another project that requires templating. 12 Jan 2017 Expected Behavior When a template contains: {% set myvar = "foo" %} {{ myvar } a Jinja2 bug) - it's easily repeatable with the ad-hoc ansible command though: . There are a few other things that go on with roles. 7, including latest devel branch Environment: N/A Summary: Ansible cannot template config files that need to preserve {{ syntax (e. You can also use the values stored in the variables for arithmetic operations. Any arguments specified in this variable are added to the sftp/scp/ssh command line when connecting to the relevant host(s). 4. Jul 27, 2017 · Working with date and timestamp in Ansible Posted on July 27, 2017 April 27, 2018 by Ansible admin Getting the system timestamp is very useful in multiple types of scenarios while scripting. Example Jun 06, 2017 · Remember that earlier in the script we set the variable baseline to be the location of our template, so here we are rendering the actual Jinja2 template we created. Ansible will look at the EDITOR environment variable to find your preferred editor. 16 Jul 2018 So, when I set out to automate this process using Ansible, I knew this wasn't inventory loop in a Jinja2 template—at least, that wasn't all it was going to be. In all the below examples you need to replace with your particular variable. At work, we are spinning up hosted trials for a historically on-premise product (no multi-tenancy). Mapping strings into numbers in Ansible How to make a stable mapping of a string into a numeric hash within given range, by using only Ansible and Jinja2. Ansible devs have disabled this feature because of Dec 15, 2013 · Ansible and it's built-in integration with the Jinja2 templating system makes managing virtual hosts (and other files where you might have a lot of repeated boilerplate with different variables) simple. ---# create a list of variables and assign that variable to an ansible # fact. Mastering YAML and Jinja2: 47:28 YAML and JSON YAML is the data presentation language used extensively by Ansible playbooks and variable files. Just like any other variable, an Ansible variable is assigned a value which is used in computing playbooks. GitHub Gist: instantly share code, notes, and snippets. There are several conditions we can use with “if”. Loop over Ansible variable array in Jinja2 template. Ansible is a very powerful configuration management tool. For more details on installation see these resources: Dec 15, 2014 · ansible. 127. ansible-vsphere-management. exim config), and there seems to be no workaround Any of them can be used anywhere Jinja2 templating is in effect. Variable Precedence If a variable with the same name is defined in multiple places, the variable with the higher precedence will be used. The Jinja2 template is populated from configuration variables which can be defined with various methods, inside the playbook, in an inventory file or loaded from inventory files. append() but it is not available on the Jinja version used in your tool, but the above works. 18 Oct 2016 SaltStack: Setting a jinja2 variable from an inner block scope and if a condition is met inside the loop, then 'foundUser' would be set to True. created by luke_ a community for 6 years Host set via host groups or on hosts by the inventory, facts or registered tasks; Within each scope there are many places a variable can be defined. The only reliable solution I could find is the Jinja2 regex_replace filter available since Ansible 2. In this example, the same role was invoked multiple times. u/AnujKulkarni. In the simplest form, you can use it to test if a variable is defined, not empty or not false. In this article, i’ll show how to test if a variable exists or not, if it is empty or not and if it is set to True. com" keyword to the value and st In short, the variables use Jinja2. No luck with this either - Convinced it must be something wrong with another aspect of my Ansible setup @030 – jto May 29 '18 at 13:48 add a comment | 1 Answer 1 Anywho, in this pre task, we basically want to re-set the symfony_env variable to a lowercased version of itself. In the debug task I am multiplying it with 5. this was a remote server), but since we are running this locally we can set this to none. yml) See also “Variable Precedence”, a little farther down… Ansible has built in variables which you can come in handy with some Playbooks. In particular one variable could refer to another defined in the same with block’s opening statement. Recently I shared my experience with using Ansible with Microsoft Azure at a local meetup, and I now have decided to share it with a larger audience. So finally, you have to use default filter to be safe. Oct 04, 2018 · The additional_opts variable never contained any value outside of the loop. 5. There are a lot of builtin filters which can be used in the Ansible playbook. 4 - 127. Jinja2 includes many built-in filters and Ansible supplies many more filters. If you’re running Ansible from the development branch, you need to run these commands each time to set up your environment variables, including your PATH variable so that your shell knows where the ansible and ansible-playbooks programs are: $ cd . Ansible Container reads the contents of the variable file, devel. An Ansible Role is a reusable and redistributable unit of code. Active 1 year, 4 months ago. In order for Ansible to parse the Jinja2 template variable within the brackets, passing in the passwords set in the Variable file. _Note: A better approach might be to use the ansible regex_replace filter within map, Generating/Executing Terraform Plans Using Ansible 14 minute read Recently I have been working on a little project of my own based on provisioning a vSphere environment using Ansible as the primary automation tool. It can be used to deploy settings and software to one or more (virtual) machines. {{ myvar | filter }} Ansible variables allow playbooks to work with static code that is dynamically adapted to specific environments. If this is set to True the first newline after a block is removed (block, not variable tag!) False: lstrip_blocks: If this is set to True leading spaces and tabs are stripped from the start of a line to a block. Set the src parameter to a jinja2 template in your . JINJA2 template which will have vendor-specific (JunOS and IOS-XR in our case) configuration template. Example 4-7 shows the output of the apt module when the package was already present on the host. These variables will be available to subsequent plays during an ansible-playbook run, but will not be saved across executions even if you use a fact cache. Ansible devs have disabled this feature because of Ansible allows you to reference variables in your playbooks using the Jinja2 templating system. trim_blocks: If this is set to True the first newline after a block is removed (block, not variable tag!). Home > CentOS > CentOS 6. Some users prefer that variables that are hashes (aka ‘dictionaries’ in Python terms) are merged. Getting back to the topic at hand, iterating over the hash can be achieved by creating a custom jinja2 filter. Ansible has three main scopes: Global: this is set by config, environment variables and the command line; Play: each play and contained structures, vars entries (vars; vars_files; vars_prompt), role defaults and vars. cfg path. Ansible variables address a range of scopes. 46 ansible_user=root ## variables with values ## How to set and use sudo password for Ansible Vault; Feb 08, 2019 · This will help you with usage of variables in Ansible. Documentation for them can be found here. If the variable kolla_ansible_target_venv is set, kolla-ansible will be configured to create and use a virtual environment on the remote hosts. JSON is the presentation language used between Ansible and external components. 1 - ip: 2. Set variables dynamically in a task When you want to let a variable depend on another on or just on a fact, you can set the variable on the fly in the task using the variable. Jun 12, 2018 · The intended use here is to run this role in Ansible Tower. 5 and will be removed in v2. 1). However, if the ansible variable hash_behaviour is set to merge the final variable state is created by recursively merging all hashes. com" keyword to the value and st The latter is what I usually choose to do, as it is quite simple to set up, and the facts are always available on all hosts, even if you are doing something like: getting all the facts for all the hosts while connected to a nagios host in order to generate its configuration files. So the three list items will be in three lines. _Note: A better approach might be to use the ansible regex_replace filter within map, So as you can see, it reads a list variable of “hosts” and iterates through it and finally creates the corresponding directive of Nginx config file. This setting controls how variables merge in Ansible. I'm trying to loop on a Apr 11, 2017 · Ansible variable arithmetic example. Ansible can be configured to use a virtualenv by setting the host variable ansible_python_interpreter to a path to a python interpreter in an existing virtual environment. The variables in a template file will be denoted by the double curly braces, directory, you should set the value of the backup parameter to 'yes'. Then when the fact is set I get this error: 'dict object' has no attribute 'stdout' I get that the issue is that there is no stdout attribute for the registered variable, but I'm not sure how to set the fact to be empty as well. A simple example is to automate configuring IP addresses on systems which will be unique for each system. Feb 16, 2017 · In our example we see that because we can’t call the variable outside of the inner loop, the counting didn’t work. Ansible template module. Ansible uses Jinja2 for its templating engine; however, a full explanation of Jinja is outside the scope of this tutorial. Essentially, you can use a Jinja2 template to have one configuration file with variables whose values are computed and substituted during an Ansible play. Why wasn't  24 Oct 2017 Network Configuration Templates with Ansible and Jinja2 . 5 - 127. Anywho, in this pre task, we basically want to re-set the symfony_env variable to a lowercased version of itself. Apr 26, 2017 · All you need is SSH access and Python installed on the relevant machines. Lastly, when this code is run, ensure ANSIBLE_CONFIG variable is set with the full path to ansible. Issue Type: Bug Report Ansible Version: At least >= 1. Close. For instance, in a simple template, you can do something like: My amp goes to {{ max_amp_value }} In this context there are several useful tests that you can apply using Jinja2 filters in Ansible. We can say that roles it is a collections of variables, tasks, modules, files and templates. \\1) with 4 backslashes (\\\\) instead of 2 (\\). You can also set different permissions, different group permissions, set the owner of the file, create files with content in them etc. this is set by config, environment variables and the command line; Using variables inside jinja2 template. I use this approach to query an elaborate AWS cluster, Nov 17, 2019 · In Ansible there are multiple methods to create new empty files. cfg file and a small change to your template, and we can get this working. In Jinja versions before 2. i18n In this article, i’ll show how to test if a variable exists or not, if it is empty or not and if it is set to True. up vote 3 down vote favorite. This feature enables the creation of generic roles and playbooks that work without modification for multiple environments, or even multiple projects by simply overriding variables in the group_vars/ directory, the playbook, or even the command line. Feb 08, 2019 · Variables comes in picture with ansible to achieve code re-usability which can varies from system to system. The rest of this page describes YAML configuration, Ansible playbook, and Jinja2 template I used to remove configuration section from Cisco IOS device configuration with regex matches (the full source of the playbook can be found on github). “How to filter a dictionary in Ansible” is published by George Shuklin in OpsOps. cfg (or set the environment variable ANSIBLE_JINJA2_NATIVE = True. Callbacks This is an ANSIBLE Cheat Sheet from Jon Warbrick. Then, at the group level, we set the variable ‘http_server_port’ to 80. Before using the ansible-vault command, it is a good idea to specify your preferred text editor. Places to define variables: inventory; playbook; included files and roles; local facts; ansible command line (--extra-vars "foo=1 bar=2" or --extra-vars @filepath. 8, it is possible to use the default filter to omit variables and module parameters using the special omit variable: - name : touch files with an optional mode file : dest={{item. 3 Variable Scopes. Recommend:jinja2 - Change variable in Ansible template based on group s-slaves]host2. Ask Question. For more information on how to control the whitespaces checkout the jinja2 documentation. html. Github, Bugzilla, and Atlassian are some of the competitive product for Ansible in the IT market. 6), Ansible may display warnings based on the configuration of the # system running ansible itself. 9 the behavior of referencing one variable to another had some unintended consequences. Jun 07, 2017 · Ansible Role Variables as Defaults. So I'm trying to create the template like this: Process complex variables with set_fact and with_items. Variables in ansible have three scopes Global set from the command line or defined in anisble. {{ myvar | filter }} [ansible-project] How can append values into host variable [ansible-project] How to define host var and append values to it from task [ansible-project] Ansible: How to use a Variable as an Index? [ansible-project] ignore_errors does not take variable [ansible-project] Ansible playbook-wide variable? [ansible-project] Changing existing variable Oct 18, 2019 · Loading variables from . That means the lookup value could be different in different tasks. Secondly, the ipv4 address is output with a simple lookup: hostvars [item]. 2 The Situation Using Ansible 2. jinja') as f: tmpl = Template(f. False: newline_sequence: The sequence that starts a newline. So if we call this template with the template You are currently using just the one variable that you declared inside group vars. Those variables can even be other lists Let’s get started on how to install Ansible on Linux Ubuntu and macOS. [ansible-project] set_fact vs register [ansible-project] When should a module say 'changed' [ansible-project] Three and more conditions in playbook Use Ansible with cloud services and containers and provision it with AWS and Docker. With this method, you can understand all of the variables that will be applied to hosts in the database group by viewing the group_vars/database/vars file. Jan 17, 2016 · Since Ansible uses Jinja2 for evaluating variables, as well as for templates, you can use filters inside of {{ braces }} in your playbooks, as well as inside of your template files. In the following task, I am storing the integer value ‘5’ in a variable int_var. If needed, Ansible can easily connect with Kerberos, LDAP, and other centralized authentication management systems. Jul 27, 2016 · Examples: /etc/hosts and workers. ansible jinja2 set variable

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